Door-key.



A. SGHRADER.

DOOR KEY.

APPLIOATION FILED JUNE 16, 1913.

1 82,560, Patented Dec. 30, 1913.

VV/fr/ 65565, I //7 1/6/7 70/x UNTT STATS PATENT OFFICE.

ANTON SGHBADER, OF CASTROP, POST RAUXEL GERMANY, ASSIGNOB 0F ONE-HALF TOOTTO LAMBERT, OF CASTROP, GERMANY.

DOOR-KEY.

nosaeeo.

To all whom it may concern:

Be it known that I, ANTON SoHRADER, a subject of the Emperor of Germany,reslding at Castrop, Post Rauxel, Westphalia, Germany. have inventedcertain Improvements in Door-Keys, of which the following is aspecification,

The present invention relates to a door key and consists in theprovision of a handle in the form of a clock-work-operated bell, and ofa hollow stem holding a spring-actuated rod which can be depressed forreleas ing the clock-work and sounding the bell. The rod is fitted witha push button which projects through one side of the look when the keyis introduced from the other.

In the accompanying drawings the invention is illustrated, Figure 1representing a sectional view of the device, and Fig. 2, an elevation ofthe same at right angles to Fig. 1.

The key stem at is made hollow for the reception of a rod 6 adapted forlongitudinal displacement. The handle of the key is composed of a bellwhich is adapted to be rung by means of a clockwork in known. manner. Ahead (Z, secured to the bell end of the rod 6, is pressed by a spring 6which is arranged in the bell and which is so connected to theclock-work as to release the same for sounding the bell when the rod 6is depressed. For depressing the rod 6 a push button 0, having the samediameter as the stem ((1, is secured to the outer end of the rod, thelatter beingprolonged beyond the Specification of Letters Patent.

Application filed June 16, 1913.

Patented Dec. 30, 1913. Serial No. 774,050.

end of the stem sufliciently for allowing a depression.

When the key is placed in the lock, the push-button 0 projects at theopposite side so of the same so that a person outside the door candepress the button for ringing the bell.

The bell f is so connected to the stem at that the center of gravity isout of register with the axis of the stem. It has thus a tendency tohold the key in a certain position. The bit 9 of the key is so arrangedas to be out of register with the key-hole when the key occupies theposition determined by the bell. Owing to this arrangement, which isknown per se, a dislocation of the key by means of the push button 0, isprevented.

I claim A door key having a hollow stem, a handle in the form of aclock-work-operated bell connected to said stem, a spring-actuated rodarranged in the hollow stern so that it can be displaced longitudinallyfor releasing the clock-work and ringing the bell, and a push-buttonconnected to the outer end of the rod, said push button being arrangedso that it can be depressed, from one side of the lock, for ringing thebell, when the key is inserted into the lock from the other side, thebell being connected to the stem so as to tend by gravity to hold thekey-bit out of register with the key-hole.

ANTON SCHRADER.

Witnesses Gnnrnuo SGHAFER, Enssm F. DUNLAP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

